The patented moisture control system in Cool-Lite Hiker Pro Crew Socks works to keep feet warm, dry, and blister-free on your outdoor adventures. Dri-Release technology further repels and wicks away moisture for quick evaporation, while the FreshGuard anti-odor treatment ensures that feet stay fresher. X2O acrylic contains Chitosan, a natural odor defense, for added odor protection. Cool-Lite Hiker Pro Socks offer a foot-hugging fit, a stay-put leg and top, cushiony sole, breathable mesh instep, and a seamless toe closure. Made from a comfy blend of 61% Dri-release, 21% stretch nylon, 17% X2O acrylic, and 1% spandex fabric. Made in the USA.